Impatiens downy mildew, which kills any Impatiens walleriana plants that it infects, has been a huge topic of discussion this year. When a pathogen kills entire beds of a plant that swiftly and dramatically, people tend to notice. The American Nursery and Landscape Association and OFA have put together a couple of resources to help people understand what it is, as well as what they can do about it. First, there’s a nine-minute video featuring Chris Beytes of GrowerTalks talking to experts. And second, ANLA and OFA will host a webinar at 10 a.m. Pacific, 1 p.m. Eastern, next Thursday, Oct. 4. “Dr. Colleen Warfield from Ball Horticultural and Nancy Rechcigl from Syngenta will be presenting what they’ve learned about this pathogen over the last season and describing how the lessons learned can be applied for a more productive 2013,” ANLA stated on its IDM website, www.impatiensdownymildew.com.